Now showing items 21-40 of 140

  • An observational description of a tornadic severe weather event 

    Bech, Joan; Pineda Rüegg, Nicolau; Aran, M; Amaro, J; Gayà, M; Arús, J; Montañá Puig, Juan; Van der Velde, Oscar Arnoud (2009)
    Conference lecture
    Restricted access - author's decision
    This study presents an analysis of a severe weather case study that took place during the early morning of the 2nd of November 2008, when intense convective activity associated to a rapidly evolving low pressure system ...
  • A propagative model for simulations of electric fields produced by downward leaders 

    Hermoso Costa, Juan Ramón; Montañá Puig, Juan; March Nomen, Víctor; Van der Velde, Oscar Arnoud; Solà de las Fuentes, Glòria; Romero Durán, David; Hermoso Alameda, Blas; Pineda Rüegg, Nicolau (2012-07-13)
    Article
    Open Access
    Comparisons of simulated downward negative leaders with experimental measurements are presented in this paper. In order to simplify, the leaders are considered to progress vertically and charge distributions and leader ...
  • A propagative model for simulations of electric fields produced by downward leaders 

    Hermoso Costa, Juan Ramón; Montañá Puig, Juan; March Nomen, Víctor; Romero Durán, David; Solà de las Fuentes, Glòria; Van der Velde, Oscar Arnoud (2010)
    Conference lecture
    Restricted access - author's decision
    This paper presents simulations of a downward negative leaders performed by means of 3D finite element method (FEM). The leaders are considered do progress vertically leaders in which different charge distributions and ...
  • A simple method to estimate the return stroke current from close electric field measurements 

    Montañá Puig, Juan; Illa Arnau, Àngel; Hermoso Alameda, Blas; Romero Durán, David (2004)
    Conference lecture
    Restricted access - author's decision
    During summers 2003 and 2004 a measurement campaign was carried out over Catalonia (N-E of Spain). In these campaigns, lightning electrostatic field as well electric and magnetic fields were measured. This paper describes ...
  • A study of thunderstorm characteristics using lightning and weather radar observations 

    Pineda Rüegg, Nicolau; Bech, Joan; Rigo, Tomeu; Montañá Puig, Juan (2004)
    Conference lecture
    Restricted access - author's decision
    The main objective of this study was to give insight into the temporal and spatial aspects of lightning activity during the life cycle of diverse types of thunderstorms, and to examine the possible relationships with ...
  • Basic lightning flash properties derived from lightning mapping array data 

    Montañá Puig, Juan; Pineda Ruegg, Nicolau; Van der Velde, Oscar Arnoud; Solà de las Fuentes, Glòria; Argemí Ribera, Oriol; Fabró Tàpia, Ferran; Romero Durán, David; Aranguren Fino, Daniel (2016)
    Conference report
    Open Access
    The size and duration of lightning flashes are examined. Data from the Ebro Valley Laboratory Lightning Mapping Array is used as reference. Additional data from the VLF/LF LINET network is included. In the analysis, each ...
  • Basis for lightning warning systems based in natural electric field measurement 

    Montañá Puig, Juan (2003)
    Conference lecture
    Restricted access - author's decision
    The natural earth electric field is disturbed when a thundercloud is present, the evolution of the electrification before a lightning discharge gives enough time to do actions against possible lightning damages. Different ...
  • Behaviour of the windmill under lightning strikes including nonlinear grounding system 

    Montañá Puig, Juan; Candela Garolera, Anna; Romero Durán, David (2004)
    Conference lecture
    Restricted access - author's decision
    The grounding behaviour is a critical aspect in a windmill lightning protection system because can appear sparks due to a higher surge and damage parts of the windmill [1][2]. This paper proposes a model to a lightning ...
  • Catalonia (Spain) railway traction DC system project to limit lightning transient overvoltage 

    Hermoso Alameda, Blas; Montañá Puig, Juan; Garnacho, F; Carmona, M; Segovia, E (2010)
    Conference lecture
    Restricted access - author's decision
    Due to a lightning storm, during the last August 2007, the Catalonia Railway Electrical System (Spain) was victim of several disturbances and malfunctions. To give response to these problems a project has been established ...
  • Characteristics and conditions of production of TLEs observed over a maritime storm 

    Soula, Serge; Van der Velde, Oscar Arnoud; Palmiéri, J.; Chanrion, Olivier; Montañá Puig, Juan; Lefeuvre, F. (2009)
    Conference lecture
    Restricted access - author's decision
    The coordinated European campaign of TLE observation in 2007 involved several cameras in southern France and northern Spain and lasted several months of summer, fall, and winter. Thanks to good conditions of observation ...
  • Characteristics and conditions of production of transient luminous events observed over a maritime storm 

    Lointier, G.; Lefeuvre, F.; Soula, Serge; Van der Velde, Oscar Arnoud; Palmiéri, J.; Chanrion, Olivier; Neubert, Torsten; Montañá Puig, Juan; Gangneron, F.; Meyerfeld, Y. (2010-07-08)
    Article
    Restricted access - publisher's policy
    On the night of 15/16 November 2007, cameras in southern France detected 30 transient luminous events (TLEs) over a storm located in the Corsican region (France). Among these TLEs, 19 were sprites, 6 were halos, and 5 were ...
  • Characteristics of lightning flashes generating dancing sprites above thunderstorms 

    Soula, Serge; Mlynarczyk, Janusz; Fullekrug, Martin; Georgis, J.-F.; Pineda Rüegg, Nicolau; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Fabró Tàpia, Ferran (2017)
    Conference lecture
    Open Access
    During the night of October 29-30, 2013, a low-light video camera at Pic du Midi (2877 m) in the French Pyrénées, recorded TLEs above a very active storm over the Mediterranean Sea. The minimum cloud top temperature reached ...
  • Characteristics of lightning flashes generating sprites above storms (i-DUST) 

    Soula, Serge; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Fullekrug, Martin; Mezentsev, Andrew; Mlynarczyk, Janusz (EDP Sciences, 2016)
    Conference report
    Open Access
    Sprites are Transient Luminous Events (TLEs) that can extend vertically from 40 to 90 km and horizontally over several tens of km to form clusters of individual or multiple column or/and carrot-shaped luminous elements. ...
  • Characteristics of lightning related to wildfire ignitions in Catalonia 

    Pineda Rüegg, Nicolau; Montañá Puig, Juan; Van der Velde, Oscar Arnoud (2012-07-21)
    Article
    Restricted access - publisher's policy
    What are the characteristics of lightning that influence the probability that an individual stroke will ignite a wildfire? It is generally accepted that long continuing current following some return strokes is the cause ...
  • Charge structure analysis of a severe hailstorm with predominantly positive cloud-to-ground lightning 

    Pineda Ruegg, Nicolau; Rigo, Tomeu; Montañá Puig, Juan; Van der Velde, Oscar Arnoud (2016-03-10)
    Article
    Restricted access - author's decision
  • Charge structure of two tropical thunderstorms in Colombia 

    López Trujillo, Jesús Alberto; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Pineda Rüegg, Nicolau; Salvador Yuste, Albert; Romero Durán, David; Aranguren Fino, Harby Daniel; Taborda, John (2019-04-23)
    Article
    Open Access
    Charge structure derived from lightning leader development of tropical thunderstorms comprising equatorial latitudes of < ±10° has not been investigated yet. In this work, using a Lightning Mapping Array (LMA) installed ...
  • Comparison between high-speed video recordings of lightning and the detections of the Catalan Lightning Location Network (XDDE) 

    Montañá Puig, Juan; Pineda Rüegg, Nicolau; Solà de las Fuentes, Glòria; Van der Velde, Oscar Arnoud; Romero Durán, David; Aranguren Fino, Daniel (2010)
    Conference lecture
    Open Access
    Lightning detections of the Catalan Lightning Location Network (XDDE) are compared with high speed video recordings carried out in Spain during summer 2009. At that time the XDDE was composed by four sensors: two SAFIR 3000 ...
  • Comparison of global RHESSI and AGILE TGFs distributions and analysis of all AGILE satellite passes over South America. 2009-2012 period 

    Fabró Tàpia, Ferran; Montañá Puig, Juan; Marisaldi, Martino (2014)
    Conference report
    Open Access
    RHESSI and AGILE TGFs distributions in the period 2009-2012 are compared. Analysis of differences in geographical, hourly, monthly distributions of the three main TGF production regions in Earth due to differences in ...
  • CONTROL I ACCIONAMENTS DE MÀQUINES ELÈCTRIQUES (Examen 1r quadrimestre, 1r parcial) 

    Montañá Puig, Juan (Universitat Politècnica de Catalunya, 2014-11-04)
    Exam
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  • CONTROL I ACCIONAMENTS DE MÀQUINES ELÈCTRIQUES (Examen 1r quadrimestre, 1r parcial) 

    Montañá Puig, Juan (Universitat Politècnica de Catalunya, 2013-10-30)
    Exam
    Restricted access to the UPC academic community